Performance Analysis of an Internally Coded Time-Hopping Spread-Time CDMA System in the Presence of Interference

In this paper, we consider the internally coded time-hopping spread-time multiple access scheme introduced in. We evaluate the performance of the correlator receiver followed by the Viterbi algorithm in fading channel. We analyze the effect of multiple access interference (MAI) and narrowband interference (NBI). We also provide simulation results and further evaluate the performance of the system for the ultra wide band (UWB) application with the UWB channel model specified by the IEEE 802.15.4a group. For comparison, we consider the conventional ST-CDMA system. The results indicate that our method has much better performance while it has the same bandwidth and spectral efficiency as the conventional ST-CDMA system.